Odd the only thing I get which doesn't prevent using the game nor loading it up, is a profile error which is just because I have somehow a older profile than the NW.js file.
I did download the file and run the game myself to make sure that it wasn't something that was left out of the zipping. I am running the game with my computer in Japanese unicode stuff for region....only other thing I can think of it that you are missing some of the many rpgmaker stuff I've downloaded and installed over the years as many games use everything from one of the download-ables from it and such. Here's the link to the download page of it, just so you know I downloaded all of those and ran them all:
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As I'm not a dev nor experienced with the rpgmaker engine if that doesn't work I think it's maybe something similar to rpgmaker I can't help you any further I believe. (the files say that they are rpgmvp)